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    15Copyright 2005, Oracle. All rights reserved.

    Performing Database Backups

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    15-2 Copyright 2005, Oracle. All rights reserved.

    Objectives

    After completing this lesson, you should be able to do

    the following:

    Create consistent database backups

    Back up your database without shutting it down Create incremental backups

    Automate database backups

    Monitor the flash recovery area

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    Backup Solutions Overview

    Backups can be performed by using:

    Recovery Manager

    Oracle Secure Backup

    A user-managed scenario

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    Oracle Secure Backup

    Oracle Secure Backup and RMAN provide an end-

    to-end backup solution for Oracle environments:

    Centralized backup management to tape for file

    system data and the Oracle database

    Provides most well-integrated media management

    layer for RMAN backups

    Backup of any data anywhere on the network

    A single technical support resource for the entire

    backup solution expedites problem resolution. This ensures reliable data protection at lower cost

    and complexity.

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    User-Managed Backup

    A user-managed scenario:

    It is a manual process of tracking backup needs

    and status.

    It requires the DBA to write scripts. Database files must be put in the

    correct mode for backup.

    Operating system commands are

    used to make backups of files.

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    Terminology

    Backup strategy may include:

    The entire database (whole)

    A portion of the database (partial)

    Backup type may be: All information from all data files (full)

    Only information that has changed since some

    previous backup (incremental)

    Backups mode may be:

    Offline (consistent, cold)

    Online (inconsistent, hot)

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    Terminology

    Backups may be stored as:

    Image copies

    Backup sets

    Data file #2

    Data file #3

    Data file #4

    Data file #5

    Data file #1

    Data file #6

    Image copies

    Backup set

    Data file #6Data file #5

    Data file #4Data file #3

    Data file #2Data file #1

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    Recovery Manager (RMAN)

    Enterprise Manager uses Recovery Manager (RMAN) to

    perform backup and recovery operations.

    RMAN:

    Is a command-line client for advanced functions Has powerful control and scripting language

    Has a published API that enables interface with

    most popular backup software

    Backs up data, control, archived log, and server

    parameter files

    Backs up files to the disk or tape

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    Configuring Backup Settings

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    Configuring Backup Settings

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    Scheduling Backups: Strategy

    Select whole or

    partial database

    backup.

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    Scheduling Backups: Options

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    Scheduling Backups: Settings

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    Scheduling Backups: Schedule

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    Scheduling Backups: Review

    Click Edit RMAN Script to review RMAN commands.

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    Back Up the Control File to a Trace File

    Control files have an additional backup option.

    Control file trace backups may be used to recover from

    loss of all control files.

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    Back Up the Control File to a Trace File

    Full Notes Page

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    Managing Backups

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    Flash Recovery Area

    Monitor the flash recovery area to:

    Configure flashback logging

    Size the recovery area

    View current space consumption

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    Summary

    In this lesson, you should have learned how to:

    Create consistent database backups

    Back up your database without shutting it down

    Create incremental backups Automate database backups

    Monitor the flash recovery area

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    Practice Overview:

    Creating Database Backups

    This practice covers the following topics:

    Configuring your database for backups

    Backing up your database while the database is

    open for user activity Scheduling automatic nightly incremental backups

    for your database

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